Screen.



R/H. BEAUMONT.

SCREEN.

APPLICATION FILED ocr. 13, 1915.

THE coummm PLANouRAPn cO.. WASHINGTON, n. c,

Patented June 13, 1916.

2 SHEET$-SHEET I.

. BEAUMONT.

SCREEN.

APPLICATION FILED OCT- !3, 1915- Patented June 13, 1916.

2 SHEETS-qSHEET 2.

.EcncEFEnzEEEz" 1 1 1 ill- 13 THE COLUMBIA PLANUDEAPH cm, WASHINGTON, pim.

" i is a front view which extend between the ROBERT H. BEAUMONT, 011 PHILADELPHIA,

PENNSYLVANIA.

SCREEN.

Specification of Letters Patent.

Application filed October 13, 1915. Serial No. 55,645.

To all whom it may concern Be it known that I, ROBERT H. BEAUMONT, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Screens, of which the following is a specification.

The object of my invention is to provide means for adjusting a screen so as to regulate the slope of the bars, the slope of the entire screen, or the mesh of the bars.

A screen of this type is used in screening coal and other materials and is known as a cascade grizzly screen.

In the accompanying drawings: Figure 1 of a screen illustrating my invention; Fig. 2 is a longitudinal sectional view on the line a-a, Fig. 1; Fig. 3 is a sectional view on the line b-b, Fig. 2; Fig. 4

is a sectional view on the line -0, Fig. 2;

Fig. 5 is a perspective view of one of the bars of the screen, and Fig. 6 1s a View illus- 'trating in diagram the arrangement of the screen bars.

Referring tothe drawings, 1, 1 are the side plates of the screen.

in the present instance, and the rods 3 are adjustable. The bars 1 of the screen are made as clearly shown in Fig. 5, being tapered from the end 00 to the point 2 and, at the rear end of the bar, there is a half round socket 5 to accommodate the rod 2 and an extension 6 on each bar has a socket 7 to fit over the rod 3, as shown in Fig. 2, and in the diagram, Fig. 6, the forward end of one bar extends over the rear end of the bar in advance of it. The rods 3 are carried by heads 8 at each side of the screen below the side plates 1, in thepresent instance, and these heads are carried, in turn, by screw threaded rods 9 shaped as shown in Fig. 3, side plates 1 and the angle plates 10 at the upper edge of the screen and can be adjusted by nuts 11 so that when the nuts are turned the rods 3 can be raised and lowered and as the outer ends of the bars of the screen are carried by these rods the inclination of the bars can be regulated. The bars 41 are spaced apart by washers l2 and 13 on the rods 2 and 3 respectively. By increasing or diminishing the number of these washers the space between these bars can be increased or diminished as desired.-

14: is the bottom plate of the screen having sides 15 spaced, in the present instance, by means of L-shaped screw rods 16, which pass through angle plates 17 carried by the side frames 1 of the screen. The nuts on the rods 16 clamp the rods to and hold them in any position desired. On the bottom plate 1% is a series of rifiies 18 made of angle bars,'in the present instance, and these riflies catch acertain amount of the dirt passing through the screen which forms a dirt lining, as indicated in Fig. 2. The upper end of the screen frame is offset, as at 19, forming a dirt pocket, as clearly shown in said figure. The entire screen is mounted, in the present instance, on a pivot 20 and any suitable tackle can be used to turn the screen bodily on this pivot so as to diminish or increase the flow of material over the bars of the screen.

It will be seen from the above description that I provide a cascade grizzly screen of few parts in which the entire screen can be adjusted to regulate the flow of material and the inclination-of the bars of each series can also be regulated. The bars of each series can be spaced apart to any extent desired. By making each bar notched so that it will rest upon the crossrods, the bars can be readily removed in case of breakage and replaced without dismantling the entire screen, the spacing washers holding the bars in the proper'position.

It will be noticed that-the screen bars are tapered from the rear end 00 to the forward end 1 and are also preferably tapered from the upper to the lower edge so that the moment any particles of material pass through the space at the surface of the bars they will immediately be free to drop below.

I claim:

, 1. The combination in a screen of the constant flow type described, ofa frame; two series of cross rods carried by the frame, said rods being alternately arranged; a series of screen bars mounted on the rods;

and means for adjusting one series of rods to regulate the inclination of the bars and the flow of the material.

2. The combination in a screen, of a frame; two series of cross rods mounted on the frame; screws for vertically adjusting Patented June 13, 1916.

the angle plates into the space one series of rods; and screen bars mounted on the rods, the rear end of each bar being carried by the fixed rod and the forward end being carried by the adjustable rod.

3. The combination in a cascade grizzly screen, of a frame; a pivot therefor to allow for the adjustment of the entire frame (Gomez: 02 this patent may be nating With the other and to any angle desired; two series of cross rods carried by the frame, one series altern'ieans on the frame by Which one series can be adjusted; and a series of screen bars carried by the rods.

ROBERT H. BEAUMONT.

obtained for five cents each, by addressing the Commissioner of Eatents,

Washington, D. C." 

